Occasionally you come across a video that’s so satisfying to watch that your brain never wants you to close the tab. That’s what Dutch puzzle designer Oskar van Deventer has managed to create with this complex web of 19 magic gears that are all somehow able to rotate against each other without completely locking up.

Unofficially, this is the world's largest cube puzzle. I get a headache just thinking about how one would go about solving this functioning 17x17x17 behemoth. If I actually tried solving this thing, I'd probably have a nervous breakdown.